Oilon RP-130 M, Руководство по эксплуатации и обслуживанию

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2. 2. Burner operation Burner operation
2.1. 2.1. Burner operation modulating ( M ) burners Burner operation modulating ( M ) burners
2.1.1 2.1.1 Combustion air Combustion air
Burner device has been provided with a fan that is tailored to produce high and steady air
pressure, that is required to get a flawless ignition and good combustion in a modern
combustion chamber. A servomotor controls the amount of air feeded according to the
amount of fuel combusted.
2.1.2 2.1.2 Pre-ventilation, purging and ignition Pre-ventilation, purging and ignition
Before ignition burner runs through pre-ventilation and purging periods.
During the pre-ventilation period the burner fan is ran with full load settings to exhaust
explosive fumes from the boiler.
Purging period flushes the nozzle valve and the utilisation circuit. The nozzle valve is
preheated and the oil temperature controller ensures adequate temperature has been
reached for fuel atomizing.
During purging period solenoid valve (NC) is closed and solenoid valves (NO) and main
solenoid valves (NC) are open. During this time oil does not flow through the control
circuit, but only to the nozzle valve of the utilisation circuit.
After the end of the purging period servomotor turns to the position of ignition load and
solenoid valve (NC) opens and solenoid valve (NO) closes. The oil pressure begins to
take effect on the nozzle control circuit. Oil flows from the nozzle. Spark between the
ignition electrodes ignites oil spraying from the nozzle.
2.1.3 2.1.3 Atomizing Atomizing
During burner operation the capacity controller drives the servomotor, which drives the oil
regulator and air dampers between partial load and full load according to the capacity
demand.
If the burner shuts down, solenoid valve (NC) and main solenoid valves close, solenoid
valve (NO) opens. Oil pressure is released from nozzle valve. Nozzle valve springback
closes the needle valve in the nozzle and closes the oil flow in the nozzle.
10 (77) RPMARINES 30820641GB
2. Burner operation